Instant Degradation of Organic Dyes in Contaminated Rivers Using Iron-Doped Zinc Quaternary-Based Quantum Dots Nanocatalyst
Organic dyes such as methylene blue (MB) and rhodamine 6G (Rh 6G), when dissolved in water, pose a serious threat to the environment, humans, and aquatic life. In this study, we report the synthesis of Fe-doped ZnCuInS/ZnS core/shell quantum dots (FeZCIS/ZnS QDs) in aqueous solution by varying the i...
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2024-12-01
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| author | Nande Mgedle Oluwatobi Samuel Oluwafemi |
| author_facet | Nande Mgedle Oluwatobi Samuel Oluwafemi |
| author_sort | Nande Mgedle |
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| description | Organic dyes such as methylene blue (MB) and rhodamine 6G (Rh 6G), when dissolved in water, pose a serious threat to the environment, humans, and aquatic life. In this study, we report the synthesis of Fe-doped ZnCuInS/ZnS core/shell quantum dots (FeZCIS/ZnS QDs) in aqueous solution by varying the iron concentrations (0%, 1%, 3%, 5%, 7%, and 10%) for the instant removal of these organic pollutants in contaminated water. The as-synthesized FeZCIS/ZnS QDs were negatively charged and spherical in shape with a diameter of 2.97 nm ± 0.73 nm. Furthermore, it showed improved quantum yield (QYs) compared to the undoped with an average lifetime of 37.15 ns (3% Fe-doped QDs). The undoped ZCIS/ZnS QDs showed percentage removal efficiency of 94.42% and 93.97% for MB and Rh 6G in contaminated deionized water, respectively, and 90.73% (MB) and 1.28% (Rh 6G), respectively, in contaminated rivers. However, the 3% FeZCIS/ZnS QDs showed a percentage removal efficiency of 99.94% and 95.79% for MB and Rh 6G in contaminated deionized water, respectively, and 91.42% and 11.11%, respectively, in rivers contaminated with the dyes. Increasing the concentration of the nanocatalyst to 4 mg/mL improved the removal efficiency of Rh 6G in contaminated rivers to 93.28% and 94.40% using ZCIS/ZnS QDs and FeZCIS/ZnS QDs, respectively. |
| format | Article |
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| spelling | doaj-art-14384bea87994f00963bd07b2483d3ee2025-08-20T02:01:09ZengMDPI AGReactions2624-781X2024-12-0154999101210.3390/reactions5040052Instant Degradation of Organic Dyes in Contaminated Rivers Using Iron-Doped Zinc Quaternary-Based Quantum Dots NanocatalystNande Mgedle0Oluwatobi Samuel Oluwafemi1Department of Chemical Sciences, University of Johannesburg, Doornfontein, P.O. Box 17011, Johannesburg 2028, South AfricaCentre for Nanomaterials Science Research, University of Johannesburg, Doornfontein, P.O. Box 17011, Johannesburg 2028, South AfricaOrganic dyes such as methylene blue (MB) and rhodamine 6G (Rh 6G), when dissolved in water, pose a serious threat to the environment, humans, and aquatic life. In this study, we report the synthesis of Fe-doped ZnCuInS/ZnS core/shell quantum dots (FeZCIS/ZnS QDs) in aqueous solution by varying the iron concentrations (0%, 1%, 3%, 5%, 7%, and 10%) for the instant removal of these organic pollutants in contaminated water. The as-synthesized FeZCIS/ZnS QDs were negatively charged and spherical in shape with a diameter of 2.97 nm ± 0.73 nm. Furthermore, it showed improved quantum yield (QYs) compared to the undoped with an average lifetime of 37.15 ns (3% Fe-doped QDs). The undoped ZCIS/ZnS QDs showed percentage removal efficiency of 94.42% and 93.97% for MB and Rh 6G in contaminated deionized water, respectively, and 90.73% (MB) and 1.28% (Rh 6G), respectively, in contaminated rivers. However, the 3% FeZCIS/ZnS QDs showed a percentage removal efficiency of 99.94% and 95.79% for MB and Rh 6G in contaminated deionized water, respectively, and 91.42% and 11.11%, respectively, in rivers contaminated with the dyes. Increasing the concentration of the nanocatalyst to 4 mg/mL improved the removal efficiency of Rh 6G in contaminated rivers to 93.28% and 94.40% using ZCIS/ZnS QDs and FeZCIS/ZnS QDs, respectively.https://www.mdpi.com/2624-781X/5/4/52quantum dotsFe-ZnCuInS/ZnS core/shellriverscoagulationdegradationorganic dye |
| spellingShingle | Nande Mgedle Oluwatobi Samuel Oluwafemi Instant Degradation of Organic Dyes in Contaminated Rivers Using Iron-Doped Zinc Quaternary-Based Quantum Dots Nanocatalyst Reactions quantum dots Fe-ZnCuInS/ZnS core/shell rivers coagulation degradation organic dye |
| title | Instant Degradation of Organic Dyes in Contaminated Rivers Using Iron-Doped Zinc Quaternary-Based Quantum Dots Nanocatalyst |
| title_full | Instant Degradation of Organic Dyes in Contaminated Rivers Using Iron-Doped Zinc Quaternary-Based Quantum Dots Nanocatalyst |
| title_fullStr | Instant Degradation of Organic Dyes in Contaminated Rivers Using Iron-Doped Zinc Quaternary-Based Quantum Dots Nanocatalyst |
| title_full_unstemmed | Instant Degradation of Organic Dyes in Contaminated Rivers Using Iron-Doped Zinc Quaternary-Based Quantum Dots Nanocatalyst |
| title_short | Instant Degradation of Organic Dyes in Contaminated Rivers Using Iron-Doped Zinc Quaternary-Based Quantum Dots Nanocatalyst |
| title_sort | instant degradation of organic dyes in contaminated rivers using iron doped zinc quaternary based quantum dots nanocatalyst |
| topic | quantum dots Fe-ZnCuInS/ZnS core/shell rivers coagulation degradation organic dye |
| url | https://www.mdpi.com/2624-781X/5/4/52 |
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